Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The hormone ethylene is necessary for plant resistance

21.03.2003


Dutch phytopathologists have shown that ethylene is vital for the protection of plants against bacteria and fungi. This is another function for the plant hormone already known to play a role in plant aging and fruit ripening.



Bart Geraats from Utrecht University demonstrated that plants which are insensitive for the hormone ethylene are hypersensitive to various microorganisms. The research implies that farmers and horticulturalists must be careful with substances that inhibit the effect of ethylene. Such substances could increase the susceptibility of plants to pathogens.

The researchers produced modified tobacco plants which were insensitive to ethylene. These plants were spontaneously diseased and wilted when grown in ordinary compost. Various fungi and fungi-like microorganisms in the compost attacked the ethylene-insensitive tobacco. These microorganisms do not usually cause diseases in unmodified plants.


Furthermore, various tobacco pathogens caused considerably more damage in the modified than in the unmodified tobacco plants.

This showed that plants must be able to detect ethylene in order to protect themselves against infections caused by various microorganisms.

Efforts to make the ethylene-insensitive plants more resistant were not successful. The administration of chemical substances which normally activate disease resistance in plants provided no increased resistance to the microorganisms in the compost. Treating the roots with harmless or even ’healthy’ bacteria gave no protection either. These bacteria should have competed with the pathogenic microorganisms or could even have increased the disease resistance of the plants.

Ethylene therefore appears to play a key role in activating the resistance mechanism against infectious microorganisms.

For further information please contact Bart Geraats (Department of Phytopathology, Utrecht University), tel. +31 (0)30 2536857, fax +31 (0)30 2518366, e-mail: b.p.j.geraats@bio.uu.nl. The doctoral thesis will be defended on 17 March 2003. Mr Geraats’ supervisor is Prof L.C. van Loon.

Nalinie Moerlie | alfa
Further information:
http://www.nwo.nl/news

More articles from Life Sciences:

nachricht Single-stranded DNA and RNA origami go live
15.12.2017 | Wyss Institute for Biologically Inspired Engineering at Harvard

nachricht New antbird species discovered in Peru by LSU ornithologists
15.12.2017 | Louisiana State University

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: First-of-its-kind chemical oscillator offers new level of molecular control

DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.

Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...

Im Focus: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

Im Focus: Scientists channel graphene to understand filtration and ion transport into cells

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.

To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...

Im Focus: Towards data storage at the single molecule level

The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.

Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

Engineers program tiny robots to move, think like insects

15.12.2017 | Power and Electrical Engineering

One in 5 materials chemistry papers may be wrong, study suggests

15.12.2017 | Materials Sciences

New antbird species discovered in Peru by LSU ornithologists

15.12.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>